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Schedule II-Valuation and Qualifying Accounts (in thousands) | 12 Months Ended
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Dec. 31, 2012
Schedule II-Valuation and Qualifying Accounts (in thousands) |
Schedule II-Valuation and Qualifying Accounts (in thousands) | Schedule II—Valuation and Qualifying Accounts (in thousands)
COL. A |  | COL. B |  | COL. C |  | COL. D |  | COL. E |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
|  |  |  | Additions |  |  |  |  |
Description |  | Balance at Beginning of Period |  | Charged to Costs and Expenses |  | Charged to Other Accounts |  | Deductions |  | Balance at End of Period |
Deducted from asset accounts: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Year ended December 31, 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 468 |  | $ | 198 |  | $ | — |  | $ | (174 | ) | $ | 492 |
Valuation allowance in net deferred tax assets |  |  | 1,765 |  |  | 2,943 |  |  | — |  |  | — |  |  | 4,708 |
|  | $ | 2,233 |  | $ | 3,141 |  | $ | — |  | $ | (174 | ) | $ | 5,200 |
Year ended December 31, 2011 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 512 |  | $ | — |  | $ | — |  | $ | (44 | ) | $ | 468 |
Valuation allowance in net deferred tax assets |  |  | 1,644 |  |  | — |  |  | — |  |  | 121 |  |  | 1,765 |
|  | $ | 2,156 |  | $ | — |  | $ | — |  | $ | 77 |  | $ | 2,233 |
Year ended December 31, 2010 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Allowance for doubtful accounts |  | $ | 438 |  | $ | 40 |  | $ | 34 |  | $ | — |  | $ | 512 |
Valuation allowance in net deferred tax assets |  |  | 84,723 |  |  | — |  |  | (2,663 | ) |  | (80,416 | ) |  | 1,644 |
|  | $ | 85,161 |  | $ | 40 |  | $ | (2,629 | ) | $ | (80,416 | ) | $ | 2,156 |

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- Definition The entire disclosure for any allowance and reserve accounts (their beginning and ending balances, as well as a reconciliation by type of activity during the period). Alternatively, disclosure of the required information may be within the footnotes to the financial statements or a supplemental schedule to the financial statements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 09 -Article 12 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e24092-122690 + Details
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